1.Pin friction test The sample for Pin friction test is cylindrical pin under the sample for the ring. Can make the materail process into a pin sample. If the test force is small it can do single-pin friction test, also can do three-pin test at the same time. The friction as follows:

2.Thrust ring end face friction test Can do the wear test between two mataril face. The friction sample of studied materail can be processed into upper and lower speciment.

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